Dispersion stability and tribological properties of additives introduced by ultrasonic and microwave assisted ball milling in oil

Abstract

<p>Additives were uniformly dispersed in base oil by ultrasonic and microwave assisted ball milling.</p>

Artificial Intelligence-Based Rapid Design of Grease with Chemically Functionalized Graphene and Carbon Nanotubes as Lubrication Additives

“…Next, the mixture was adequately stirred using a magnetic force. Then, the mixture was placed into the ball milling tank together with the appropriate amount of zirconia grinding balls and treated by a self-designed microwave-assisted ball milling machine (Figure S1) for 1 h. The microwave irradiation power was 300 W. The experimental parameters were obtained according to previous experience …”

“…Then, the mixture was placed into the ball milling tank together with the appropriate amount of zirconia grinding balls and treated by a self-designed microwave-assisted ball milling machine (Figure S1) for 1 h. The microwave irradiation power was 300 W. The experimental parameters were obtained according to previous experience. 30 The mixture was cooled to room temperature. Subsequently, the samples were centrifuged and the precipitate was rinsed three times with acetone and anhydrous ethanol to eliminate excess organic molecules.…”

Tribological Behaviour of Graphene Nanoplatelets as Additive in Pongamia Oil

“…For MO + 0.2, the spike occurred at around 600 s and caused the COF to increase rapidly, though only in the short term. This can be attributed to NPs' suspension stability decreasing at high concentrations, which affects their anti-friction performance [43]. During the stable stage (900-3600 s), it could be observed that MO and MO + 0.2 maintained a slightly higher COF compared to the others, while MO + 0.05 clearly showed better anti-friction performance.…”

Ethylene glycol nanofluids dispersed with monolayer graphene oxide nanosheet for high-performance subzero cold thermal energy storage

“…With a concentration of 3.75 mg mL À1 , the zeta potential of EGO nanouids decreased from 66.2 mV to 60.9 mV aer 50 cycles, which are much higher than the required value of 30 mV for achieving stable dispersion of the nanouids. 48,49 By contrast, WGO nanouids have zeta potentials of 21.6 mV and 16.3 mV before and aer the cycling tests, respectively. Compared with the stacked WGO sheets, the monolayer EGO sheet has more exposed edges, which were decorated with abundant oxygencontaining functional groups.…”